This is the first reason for track versions that makes sense to me - external fx. To keep the same fx routing, and only change “events” on the track. Kinda like a folder for ideas that stick to the same channel. But I fail to see how this differs from lanes. Maybe it is just another way to deal with lanes, while lanes worked more as comping tool, now track versions work as named fixed set of material that plays through track channel. Anyway, not at all what I hoped it to be.